1. Annual Book of ASTM Standards;ASTM Standard B374,1981
2. Annual Book of ASTM Standards;ASTM Standard B503,1981
3. Annual Book of ASTM Standards;ASTM Standard B450,1981
4. Annual Book of ASTM Standards;ASTM Standard B431,1981
5. U.S. Department of Commerce, Springfield;OI Pavlova,1977